Metallurgical furnace



2 sheets sheet 1.

(No Model.)

N. MQGONNELL.

MBTALLURGICAL PURNAGB.

Patentednec: 1 4, 1897.

INVENTOR WITNESSES UNITED STATES PATENT OFFICE.

NIVEN MCCONNELL, OF MUNHALL, PENNSYLVANIA.

M TALLU RGICAL FU RNACIE.

SPECIFICATION forming part of Letters Patent No. 595,646, dated December 14, 1897.

Application filed January 20, 1897. Serial No. 619 ,855. (No model.)

ToaZZ whom it may concern,.-

Be it known that I, NIVEN MCCONNELL, of Munhall, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Metallurgical Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this speciication, in whichyFigure 1 is a horizontal section through the air and gas flues and apart of the hearth of a regenerative metallurgical furnace, the section vbeing taken on the line I I of Fig. 2. Fig. 2 is a vertical section on the line II II of Fig.- 1, and Fig. 3 is a perspective View of the cooling-plate which I prefer to employ and which forms the subject of one of my claims.

In the drawings, 2 represents the hearth of an open-hearth steel-furnace.

3 3 are the gas-flues, and 4 et are the airflues which lead from the regenerators into one end of the furnace, the other end of the furnace being similarly constructed and provided with flues. As shown in the drawings, the air and gas flues extend vertically and parallel with each other, and at their upper ends the air-flues have horizontal branches extendinginto the furnace above the gas-fines.

5 5 is a longitudinal flue-wall, and 6 is a cross-wall dividing the air-fines from the gasflues. In the wall 6 and also in the wall 5 I arrange water-cooling devices through which a constant current of water is caused to iiow. These walls are thus cooled and are prevented from destruction by the intense heat of the furnace-hearth and the fluxing action of the basic material and sparks which are impelled against them by the current of the outgoing gases when the products of combustion are passing to the regenerators. By using watercooled plates at these parts of the furnace I am enabled to lengthen very greatly the time during which the furnace can be used without repairing the I'lues, for, especially when manufactured gas is used, the cutting out of the ilues in furnaces as constructed heretofore volves great waste and expense.

For the purpose of Water-coolingthese Walls I have invented and prefer to use a special coolingplate, (shown in Fig. 3,) which is preferably made in the form of an integral T-shaped casting 7 7', hollow throughout, though it may be made in separate parts secured together within the scope of my broader claim. This plate is cast with an open end or ends, which are afterward closed by cap-plates 8, applied and riveted thereto. In constructing the furnace this T-shaped plate is built in the walls 6 5', the branch 7 of the plate extending along and through the wall 6 and the branch7 extending through the wall 5 toward the furnace-hearth. Water inlet and outlet pipes 9 and 10 are applied to the opposite ends of the branch 7, the inlet being preferably at the bottom and the outlet at the top, and the plate is cast with a vertical partition Il, extending toward the end of the branch 7', so as to cause the water entering from the pipe 9 to pass in circuit around the partition and throughout the whole plate before escaping from the pipe 10.

The partition 1l may be omitted, in Which case the water-inlet would be introduced at the end of the branch 7l and a Water-outlet put at each end of the branch 7 ,and I intend to cover both forms by my broader claims.

I claiml. A water-cooling device for furnace-fines, comprising a T-shaped plate or casing, the legs of which are provided with communicating chambers, twoof the legs having waterpassages at their ends, and the third having means for providing a water circulation therein.

2. A water-cooled plate of T form, hollow throughout having a partition in the middle branch, and water inlet and outlet, the partition being arranged to act as a baffle-plate to give a circulation in the middle branch.

In testimony whereof I have hereunto set my hand. l

NIVEN MCCONNELL.

Witnesses:

G. I. HoLDsHIP, H. M. CoRwIN. 

